存储过程字符串丢失的问题
create   proc   proc_query_product
(@trade   varchar(50),@timeinfo   varchar(50))
as
    declare   @info   varchar(100),@order   varchar(50),@condition_vip   varchar(100),@condition_company   varchar(100),@sql_vip   varchar(500),@sql_company   varchar(800)
    set   @sql_company= 'select   top   15   a,b,c,d   from   TProduct   where '
    set   @sql_vip= 'select   top   15   c,d,e,f   from   TProduct   where '  
    set   @order= '   order   by   g   desc '
    set   @condition_company= '   and   exists(select   *   from   Tuser   where   (tUser.UserName=TProduct.UserName)   and   (TUser.userrole= '+ ' ' 'company ' ' '+ ')) '
    set   @condition_vip= '   and   exists(select   *   from   Tuser   where   (tUser.UserName=TProduct.UserName)   and   (TUser.userrole= '+ ' ' 'vip ' ' '+ ')) '
begin
        select   @info=
        case   @timeinfo
        when   '不限 '   then   '(1=1) '
        when   '1天内的新消息 '   then   '(datediff(dd,ppublishtime,getdate())=0) '      
        when   '3天内的新消息 '   then   '(datediff(dd,ppublishtime,getdate()) <=3) '
        when   '7天内的新消息 '   then   '(datediff(dd,ppublishtime,getdate()) <=7) '
        when   '15天内的新消息 '   then   '(datediff(dd,ppublishtime,getdate()) <=15) '
        end
        set   @sql_company=@sql_company+ '   (ptrade= '+ ' ' ' '+@trade+ ' ' ' '+ ')   and   '+@info+@condition_company+@order
          set   @sql_vip=@sql_vip+ '   (ptrade= '+ ' ' ' '+@trade+ ' ' ' '+ ')   and   '+@info+@condition_vip+@order
                begin
                    exec(@sql_company)
                end  
                begin
                    exec(@sql_vip)
                end  
end

是用的   sql   server   2000   @trade,@timeinfo是输入参数，当执行以上存储过程时候发现@condition_company这个语句取出来的值跟设定的不一样   而@condition_vip能取到值。
@condition_company的值变为:   and   exists(select   *   from   Tuser   where   (tUser.UserName=TProduct.UserName)   and   (TUser.userrole= 'compan
@condition_vip的值为:   and   exists(select   *   from   Tuser   where   (tUser.UserName=TProduct.UserName)   and   (TUser.userrole= 'vip '))是查询语句太长导致取不到值的么       期待解决

------解决方案--------------------
declare @info varchar(100),
@order varchar(50),
@condition_vip varchar(100),
@condition_company v